Inhibition of the aero-optical effects of supersonic mixing layers based on the RVGAs'control

The infrared imaging windows of the hyper/supersonic optical dome are encountering severe aero-optical effects[AOEs],so a flow control device,the ramp vortex generator array[RVGA]is proposed based on the ramp vortex generator to inhibit the supersonic mixing layers’AOE,which is done by the nanotracer-based planar laser scattering technique and ray-tracing method.The experiments prove that under different pressure conditions,RVGA can reduce the mean and standard deviation of the root mean square of the optical path difference[OPDrms]and reduce the supersonic mixing layers’thickness and mixture a great deal.The AOE of the pressure-matched mixing layer is the weakest.Higher RVGA results in better optical performance.RVGA has the potential to be applied to supersonic film cooling to reduce aero-optical aberrations.